package com.qk.filter;

import com.qk.common.utils.JwtUtils;
import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
@Slf4j
//@WebFilter(urlPatterns = "/*")
public class TokenFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
    //1.获取请求路径
        String uri = request.getRequestURI();
    //2.判断请求路径是否为登录接口
        if (uri.contains("login")){
            log.info("登录成功 {}, 放行", uri);
            filterChain.doFilter(request, response);
            return;
        }
    //3.获取token
        String jwt = request.getHeader("token");
    //4.判断token是否存在
        if(jwt == null || jwt.isEmpty()){
            log.info("token不存在, 拦截");
            response.setStatus(401);
            return;
        }
    //5.解析令牌
        try{
            JwtUtils.parseToken(jwt);
        }catch (Exception e){
            log.info("令牌解析失败, 拦截");
            response.setStatus(401);
            return;
        }
    //6.放行
        filterChain.doFilter(request, response);
    }
}
